Cut-off for interfolding machines



GUT-OFF FOR INTERFOLDING MACHINES Filed Sept. 29 1923 Patented Aug. 11, 1925'.

UNITED STATES PATENT OFFICE.

PETER\J. CHRISTMAN, JR., OF GREEN BAY, WISCONSIN,'ASSIGNOR TO PAPER CON- 'VERTING MACHINE COMPANY, OF GREEN BAY, VIISCONSIN.

CUT-OFF FOR. INTERFOLDING MACHINES.

Application led September 29, 1923. Serial No. 665,603.

To all 'Lo/wm t may concern:

Be it known that I, PETER J. CHRIsTMAN, J r., aoitizen of the United States, and resident of Green Bay, in the county of Brown and State of 1Wisconsin, have invented certain new and useful Im -rovements in Cut- Offs for Interfolding h/loachines; and I do hereby declare that the following is a full, clear, and exact description thereof.

This invention relates toimprovements in interfolding machines and more particularly to the cutting or perforating mechanism for severing the webs of work material into sheets, prior to the interfolding operation.

The present invention is particularly designed as an improvement over the cutting mechanism illustrated and described in cons nection with my Patent No. 1,440,183 issued 'December 26, 1922, in which a straight cutting knife carried by a roller co-acts with longitudinal slots arranged in the periphery of a bed roll over which the two webs of paper pass. The result of this mechanism is to provide a straight cut in the webs, which cut, in the operation of the interfolding mechanism, must be accurately engaged by the tucker in order that the juxtaposed edges of the severed sheets will be tucked into the fold of the adjacent sheet, as illustrated and described in that patent. in machines of the type just described, it is clear that any lack of alignment of the juX- taposcd edges of the severed sheets will cause considerable trouble in the tucking operation. it is clear that in the tucking operation that buckling of the paper will result if the juxtaposed edges are out of alignment with each other, and consequently serious delay or loss of time will result in the operation of the machine.

It is, therefore, an object of the present invention to overcome the foregoing disadvantages by the provision of a cutting mechanism which so severe the web as to cause the juxtaposed edges to intermesh with one another, whereby the tucker blade engages both edges regardless of any slight disalignment of the edges with relation to the tucker. v

A more specific object is to provide a cutting mechanism in which the webs of paper are firmly gripped prior to and during the cutting o aeration.

With t e above and other obj ects in view, which will appear as the description proceeds, the invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing is illustrated one complete example of the physical embodiment of the present invention con structed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings Figure l is a transverse sectional view through a portion of an inter-folding machine illustrating the present invention, the relation of parts being shown diagrammatically.

Figure 2 is an enlarged detail sectional view illustrating a fragment of the cutting and body rolls.

Figure 3 is a fragmentary elevational view of the preferred form cutting knife.

Figure 4 is a similar view of a modification.

Figure 5 is a transverse sectional view taken on the line 5 5 of Figure 3.

Figure 6 is a fragmentary detail illustrating the severed intermeshing ends of the work material.

teferring more particularly to the accompanying drawings in which l have only illustrated a sufficient portion of an interfolding machine to enable a thorough understanding of the present invention, the numeral 1 designates a body roll mounted on the shaft 2 and provided at opposite sides with longitudinal recesses or grooves 3 which grooves are provided with recesses 4- adapted to receive the gripping bars 5 constructed of any suitable material, preferably rubber or the like.

Positioned adjacent the body roll and mounted on the shaft 6 is a cutting roll 7 having tangentially secured on its periphery a perforat-ing blade S, the cutting edge 9 of which is provided with irregular or convoluted cutting teeth.

n the preferred form of the invention, as illustrated in Figure 3, I provide the blade 8 with a saw tooth cutting edge, but inasmuch as the purpose. of the invention is to perforate the work material in such manner as to provide intermeshing tongues at the juxtaposed edges, it is obvious that a plate having a convoluted cutting edge 10, as illustrated in Figure 4, would serve a similar purpose.

Passingover the body roll 1 and between the cutter roll 7 are two webs of work material A, which, in the operation of the cutting mechanism, are simultaneously severed, and by means ofthe 'offset roller 11, the perforation in the outer web is subsequently offset with relation to that of Vtlieinner web in order 'that the proper interfolding operation may be performed. inasmuch as the interfolding operation is fully described in my previous patent to lwhich referencev is made, l. havev only illustrated a fragmentary yportion of the gripping jaws 12, and the tucker blade 13 which perform the same.Y As illustrated in Figure l, the tucker blade'lB is so timed and actuated as to engage theinner web A at the perforation and force the same into the gripping' jaws 12 which are subsequently actuated to fold the outer. sheet.

ln describingthe cutting or perforating operation particular reference is had to Figure 2 wherein the associated parts are shown as having just completed the cut, and in which it will be noted that the plate 8 co-V bar 5 and as the plate enters the groove 3- during the cutting operation, the bar 5, be

cause of its resiliency, compensates for this action and at the same time securely holds the perforated Vends of the web until the knife is withdrawn from the groove 3.

The result -ofV the foregoing 'operation is to `provide a convoluted, perforation 14 inY the work material, as illustrated in Figure 6 in which the ltongues 15 formed vin the juxtaposed edges of the sheets intermesh with one another.

From the foregoing it will be "seen that as the tuclrer plate 13 is actuated to tuck the separate edges of Vthe sheets into the fold of the adjacent sheet rformed by the jaws 12, both edges, because fof the intermeshing tongues, will be engaged regardless of any slightl disalig-nment or 'parting of the sheets, thus facilitating the tucking operation and preventing buckling of the paper "otherwise caused by failure'to force both edges into the fold.

I claim: j

f1. Inl an interfolding machine, the combination of 'a pair of rolls for receiving two means tonguesv to tuck theedges of said sheets j webs between them, `a tinted knife carried by one of said rolls for severing said webs into sheets having intermeshing tongues, means carried by the other roll for pressing said webs against said `knife to prevent displacement of said webs, and means for advancing one web with reference to the other web and forming alternate folds in said'web's with the tongues of one web positioned Within the fold of the other web.

2. In an interfolding machine the 'conv bination of, means for severing the webs of work material into sheets, ycomprisin a flutedknifeadapted to cut the work into sheets and to form interme'shing tongues on the juxtaposed edges 'of said sheets, and 1n'ea'ns for engaging said intermeshing tongues to tuck sai'd sheets into the fold of the adjacent sheet.

3. In an interfolding machine the com# bination of, a body roll over which Ithe work material passes and provided with a longitudinal groove, resilient gripping means mounted within said groove, a 'cutter `roll adjacent to said body roll, a fluted `knife mounted on said cutter roll 'andcooperating Awith the body roll to sever the webs of work material into sheets and form 1intermeshing tongues on the juirtaposed `edges 'of said sheets, and means for engaging said intermeshing `tongues to tuck sheets into the fold of the adjacent sheet.` j

4. In an interfolding machine the coinbination of, a body roll provided with l'ongi-v j tu'dinal grooves, resilient gripping means mounted within lsaid grooves, a 4cutterroll positioned adjacent to said body roll, a vfluted knife mounted tangentially von said 'cutter vroll and cooperating vwith the body roll to sever webs of work material into sheets and form lintermeshing tongues on the juxtaposed edges of said sheets, and i for engaging said interine'shing into the fold of the adjacent sheet.

`5. In an interfolding machine the )Cornbination of, a body roll provided with a longitudinal groove, resilient gripping means mounted within said gr'oove, a cutter roll Vpositioned adjacent tovsaid body roll, -a knife mounted tangentially `'on said cutter roll and cooperating with said fresilient gripping means, whereby the webs of work materiala're gripped prior to and during the severing operation'.

In testimony that I claim the lforeg'going Ihave hereuntoA set my hand at Green Bay, in thecounty of Brown and "State `of vWisconsin..V

'y VPerrin .if CHRISTMAN JR.

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